#281DB3#281DB3

#281DB3 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.1% C 0.218 H 272.3°. Best body text is #FFFFFF at 10.95:1 contrast (WCAG AA passes).

Color values

HEX	#281DB3
RGB	rgb(40, 29, 179)
HSL	hsl(244, 72%, 41%)
HSV	hsv(244, 84%, 70%)
CMYK	cmyk(77.7%, 83.8%, 0%, 29.8%)
CIE-LAB	lab(25.51, 52.68, -75.19)
CIE-LCH	lch(25.51, 91.81, 305.02°)
OKLab	oklab(38.13% 0.0086 -0.2175)
OKLCH	oklch(38.13% 0.218 272.3)
XYZ	xyz(9.4484, 4.5835, 43.0258)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281DB3 #A8B31D

analogous

#1D5DB3 #281DB3 #731DB3

triadic

#281DB3 #B3281D #1DB328

tetradic

#281DB3 #B31D5D #A8B31D #1DB373

square

#281DB3 #B31D5D #A8B31D #1DB373

split-complementary

#281DB3 #B3731D #5DB31D

monochromatic

#100C4A #1C147E #281DB3 #3D30DD #6E64E6

Accessibility & contrast

On white

10.95

#281DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#281DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281DB3

10.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281DB3	#FFFFFF	#000000	##FFFFFF
##281DB3	1.00	10.95	1.92	10.95
#FFFFFF	10.95	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0035B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #281db3;
/* rgb */ color: rgb(40, 29, 179);
/* oklch */ color: oklch(38.1% 0.218 272.3);

Tailwind

colors: {
  custom: {
    50: '#7c5fcb',
    500: '#281db3',
    950: '#000000',
  },
}

SCSS

$custom: #281db3;
$custom-light: #7c5fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#281db3",
  "rgb": {
    "r": 40,
    "g": 29,
    "b": 179
  },
  "hsl": {
    "h": 244.4,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.38126,
    "c": 0.21768,
    "h": 272.3
  },
  "luminance": 0.04585
}

Semantic roles & 50–950 ramp

primary

#281DB3

secondary

#C3CB61

accent

#EF39E1

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #281DB3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →